Installation for recooling the cooling air in circulating air cooling installations



2 Sheets-Sheet l H. ORTMEYER Filed Oct. 14, 1930 CIRCULATING AIR COOLINGINSTALLATIONS INSTALLATION ,FOR RECOOLING THE COOLING AIR IN Feb.6,1934.

$9 193% H. @mf-MEYER L9459619 INSTALLATION FOR RECOOLING THE COOLING AIRIN CIRCULATING AIR COOLING INSTALLATIONS Filed Oct. 14, 1950 2Sheets-Sheet 2 /NI/ENTHI Herman/1 Uff/maaar ffy Patented Fels, i'i,'i934 ENSTALLATION FOR RECOOLING THE COOL- ING All?, IN OIRCULATING AIRCOOLING INSTALLATIONS Hermann Ortrneyer, Berlin, Germany ApplicationOctober 14, 1930, Serial No. 488,564, and in Germany October 22, 1929 3Claims.

My invention relates to installations for recooling the air incirculating air cooling installations for electrical machinery, forexample, a turbo-generator, although the application oi my inventionwill be understood as not limited to this particular use. The hithertoknown installations of this kind involve a number of considerabledisadvantages both of a constructive kind as also in reference toechnical operation. Although mostly provided with a suiliciently largecooling surface, they are designed with a too small diameter ci the airinlet and with a too great depth, while the coolingribs are spaced toofar from each other. The space required by there is in consequenceconsiderably larger than it would be if they were correctly dimensioned.In the hitherto known cooling installations the water chambers, throttlevalves, cooling water collecting pipes, drain cocks, air release cocksand the like are not always separated from the circulating cooling aircurrent, so that leale-water may enter the cooling air current. A greatdrawback inherent in many cooling installations consists in the factthat the enclosed quantities of air take up too much room, particularlyso if the air space is formed between the oundation pillars as a largecooling air chamber, whereby not only the access to important parts ofthe coolers and condensers is obstructed, but also the natural quenchingof a fire breaking out in the windings of the electric machine is undulydelayed.

In accordance with my invention I arrange the cooler` elementshorizontally, one above the other in front of at least one of thevertical openings of the ioundation of the machine. The advantage oieredby this arrangement is that the cooler, with a relatively very largeinlet diameter for the cooling air only takes up a minimum of groundarea. However as in the pillar foundations, which are mostly used to-day`for turbogenerators, much space is available, it is possible in aninstallation according to my invention to provide a cooler of highefficiency even with a very small ground area. The further opportunity,afforded by the small depth of the cooler, of diminishing the distancebetween the cooling ribs without undue increase of the air resistance,affords an additional possibility of considerably reducing the absolutespace required for the cooler in particular and the whole coolinginstallation in general.

Another object oi my invention is to arrange the cooler elements, oneabove the other, in

5 front of the outer side or the opening in the foun- (Cl. Pil-252)dation. This arrangement permits an especially rangement of thecondenser.

In a preferred embodiment of my invention I arrange the cooler elementsat right angles to the circulating currents of cooling air, at theelements in longitudinal direction. Means may be provided, whereby partsof the active cooler surface can be temporarily shielded against theopening in the foundation, so that an exchange tion, the arrangementdescribed affording the possibility of removing and re-inserting orreplacing the individual cooler elements at any time.

ments is moreover very simple, occurring directly along a pillar of thefoundation, which, therefore, can be used with great advantage as asupport.

In the drawings:

Fig. 1 is a section of the hot air chamber of the cooling installationin parallel to the machine axis in iront of the cooler, the verticalpart of the hot-air channel in front of the cooling Water and thecollecting pipes being omitted.

Fig. 2 is a horizontal section, and Fig. 3 is a section at right anglesto the inachine axis.

capes from the air outlet terminal a of the turbogenerator b and ilowsthrough the hot air channel c to the cooler d, the elements of which ittraverses in horizontal direction and thereafter 105 enters the space fbetween the elements of the cooler d and the adjoining foundationpillars. The cold air conduit extending above the condenser g extendsfrom this space j', returning the cooled air into the air inletterminals h of ,i110

Furthermore, it renders it particularly 1^ further space, which can beutilized for the arl same time providing for free movement of the ofcooler elements is possible even during opera- The drawer-like movementof the cooler ele- "9' er, as well as the throttle valves for the cool-Y .100 Referring to the drawings, the cooling air esthe turbo-generatorb to start circulation afresh.

The horizontally arranged cooler elements of the cooler d can beseparately cut out by means of the throttle valves e without theoperations of the whole arrangement having to be interrupted on thisaccount. m are water chambers arranged at the ends of the coolerelements.

As will be seen from Figs. 2 and 3 the cooler elements can be removedand reinserted in the direction of the arrow i like a drawer.

As has already been said, a. device is suitably provided, which permitsof the shutting off of the surface taken up by the single coolerelements in certain cases, so that these can be put out of operationtemporarily during working of the plant or be completely changed. Forthe sake of clarity this device was not shown in the drawings.

Instead of air any other neutral gas can, of course, flow in the coolinginstallation.

Having fully described my invention, what I claim is:-

1. Closed air circulation cooling system for electrical machinerycomprising in combination an electrical machine, a foundation supportingsaid machine, a cooler having the form of a thin vertical wall arrangedin front of the outer wall of said foundation, the side of said cooler,where the air escapes, extending in vertical direction, and freelyaccessible water chambers associated with said cooler and a cold airconduit and a hot air conduit extending between said cooler and saidelectrical machine, said two conduits being curved to leave a largefreely accessible space below said electrical machine and below saidcold air conduit.

2. Closed air circulation cooling system for electrical machinerycomprising in combination an electrical machine, a foundation supportingsaid machine, a cooler having the form of a thin vertical wall arrangedin front of the outer wall of said foundation, the side of said cooler,where the air escapes, extending in vertical direction and in parallelto the axis of said electrical machine, freely accessible water chambersassociated with said cooler and a cold air conduit and a hot air conduitextending between said cooler and said electrical machine, said twoconduits being curved to leave a large freely accessible space belowsaid electrical machine and below said cold air conduit.

3. Closed air circulation cooling system for electrical machinerycomprising in combination an electrical machine, a foundation supportingsaid machine, a cooler having the form of a thin vertical wall arrangedin front of the outer wall of said foundation, the side of said cooler,where the air escapes, extending in vertical direction freely accessibleair chambers on said cooler, and a cold air conduit and a hot airconduit extending between said cooler and said electrical machine, saidtwo conduits being curved to leave a large freely accessible space belowsaid electrical machine and below said cold air conduit.

HERMANN ORTMEYER.

